Abstract
| Language | English |
|---|---|
| Pages | 16-29 |
| Journal | Soil and Sediment Contamination |
| Volume | 24 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2 Jan 2015 |
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Metal Removal from Contaminated Soils Through Bioleaching with Oxidizing Bacteria and Rhamnolipid Biosurfactants. / Banat, Ibrahim.
In: Soil and Sediment Contamination, Vol. 24, No. 1, 02.01.2015, p. 16-29.Research output: Contribution to journal › Article
TY - JOUR
T1 - Metal Removal from Contaminated Soils Through Bioleaching with Oxidizing Bacteria and Rhamnolipid Biosurfactants
AU - Banat, Ibrahim
PY - 2015/1/2
Y1 - 2015/1/2
N2 - The use of surfactants as a method for solubilization and removal of heavy metal contamination from soil has been reported before. Biosurfactants produced by some microorganisms are able to modify the surface of various metals and aggregate on interphases favoring the metal separation process from contaminated environments. We evaluated the feasibility of enhancing the removal of metal ions from mineral waste/contaminated soils using alternate cycles of treatment with rhamnolipid biosurfactants and bioleaching with a mixed bacterial culture of Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans. Bioleaching alone removed 50% Zn and 19% Fe. When rhamnolipids were used at low concentration (0.4mg/mL), 11% Fe and 25% Zn were removed, while at 1mg/mL 19% Fe and 52% Zn removal were achieved. When using a cyclic treatment combining bioleaching and biosurfactants, metal removal reached up to 36% for Fe and 63% to 70% for Zn.
AB - The use of surfactants as a method for solubilization and removal of heavy metal contamination from soil has been reported before. Biosurfactants produced by some microorganisms are able to modify the surface of various metals and aggregate on interphases favoring the metal separation process from contaminated environments. We evaluated the feasibility of enhancing the removal of metal ions from mineral waste/contaminated soils using alternate cycles of treatment with rhamnolipid biosurfactants and bioleaching with a mixed bacterial culture of Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans. Bioleaching alone removed 50% Zn and 19% Fe. When rhamnolipids were used at low concentration (0.4mg/mL), 11% Fe and 25% Zn were removed, while at 1mg/mL 19% Fe and 52% Zn removal were achieved. When using a cyclic treatment combining bioleaching and biosurfactants, metal removal reached up to 36% for Fe and 63% to 70% for Zn.
U2 - 10.1080/15320383.2014.907239
DO - 10.1080/15320383.2014.907239
M3 - Article
VL - 24
SP - 16
EP - 29
JO - Soil and Sediment Contamination
T2 - Soil and Sediment Contamination
JF - Soil and Sediment Contamination
SN - 1532-0383
IS - 1
ER -